Title:
HIGH FREQUENCY AMPLIFIER
Document Type and Number:
WIPO Patent Application WO/2021/140975
Kind Code:
A1
Abstract:
A high frequency amplifier comprising a driver amplifier that amplifies an inputted high frequency signal, and a Doherty amplifier that includes a carrier amplifier and a peak amplifier and that further amplifies a signal outputted by the driver amplifier, wherein: the high frequency amplifier has a first multilayer substrate, a second multilayer substrate which is overlaid and laminated on the first multilayer substrate, and a base member on which the first multilayer substrate and the second multilayer substrate are mounted; the driver amplifier is mounted on the second multilayer substrate; the carrier amplifier and the peak amplifier are mounted on the first multilayer substrate; the driver amplifier, the carrier amplifier, and the peak amplifier each have a front surface on which a predetermined circuit is formed and a back surface located on the opposite side from the front surface; the front surface of the driver amplifier faces the first multilayer substrate; the back surface of the driver amplifier is spaced apart from the first multilayer substrate; the back surfaces of the carrier amplifier and the peak amplifier are both in contact with the base member; the back surface of the driver amplifier is connected to a wiring layer disposed on the front surface of the second multilayer substrate; the wiring layer is connected to an end of a first via penetrating through the second multilayer substrate and the first multilayer substrate; and the other end of the first via is connected to the base member.
Inventors:
HASHINAGA TATSUYA (JP)
MORIYAMA YUTAKA (JP)
MORIYAMA YUTAKA (JP)
Application Number:
PCT/JP2020/048985
Publication Date:
July 15, 2021
Filing Date:
December 25, 2020
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
International Classes:
H01L25/18; H01L25/04; H03F1/02; H03F1/30; H03F3/24; H03F3/60; H05K3/46
Domestic Patent References:
| WO2005093948A1 | 2005-10-06 |
Foreign References:
| JP2006049661A | 2006-02-16 | |||
| JP2006121147A | 2006-05-11 | |||
| JP2002076241A | 2002-03-15 | |||
| JP2019087992A | 2019-06-06 | |||
| JP2013074249A | 2013-04-22 | |||
| JP2008544612A | 2008-12-04 | |||
| JP2012065117A | 2012-03-29 | |||
| JP2020002865A | 2020-01-09 | |||
| JP2020022128A | 2020-02-06 | |||
| JP2008305937A | 2008-12-18 |
Other References:
See also references of EP 4089731A4
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
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